How about using a Mr. Funnel. see it at : http://www.mrfunnel.com/

We used one of these when we were filling from cans. It keeps water out of
gas, but it's an awful mess to use -- and has no effect on keeping ethanol
out of gasoline.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"